Roll-bar for paper-pulp engines



(No Model.)

0. MORSE.

v -ROLL BAR FOR PAPER PULP ENGINES. No. 286.216. Patented Oct. 9, 1883.

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OLIVER MORSE, OF XVELLESLEY, l\I.-XSSA(JI-IUSETTS.

SPECIFICATION forming part of Letters Patent No. 286,216, dated October 9, 1883.

Application filed September 30, 1882. (No model.)

.To aZZ whom it may concern Be it known that I, OLIVER Mensa, a citi zen of the United States, residing at W'elles ley, in the countyof Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Roll-Bars for Paper-Pulp Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others' skilled in the art to which it appertains to make and use the, same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This inventionrelates to the construction of grinding-bars for the rolls of paper-pulp engincs. Heretofore it has been customary to form the bulk of the bar of wrought-iron with the steel grindingedge welded thereto. This construction is expensive both as to labor and material, and when the grinding-edge is worn down it isnecessary to remove the entirenumber of bars from the roll and replace them by new.

My present in vention consists in a bar the body of which is of cast-iron or other suitable metal, while the grindingedge is formed of an independent thin steel plate, adapted to be readily applied to and detached from the solid body without removing the latter from the roll, the two being provided with pins and holes, or their equivalents, to prevent slipping of the steel plate, upon the body of the bar, said plate being, set into a rabbet of said bar, and having its outer side flush. with the face thereof.

The drawings accompanying this specifieation represent, in Figure 1, an isometric elevation of the body of the bar, and Fig. 2 a crosssection of a completed bar containing my invention. Fig. 3 represents a cross-section of a portion of a completed roll.

- In the said drawings, A represents the body of my bar, the same being in the form of the bar now generally in use, with the exception that it is of somewhat less width, the notches in the ends of such bar, which receives the rings which confine the entire series of bars in place within the body of the roll, being shown at a a. The front face of the body A is rabbeted, as shown at B, the depth of the rabbet being equal to the thickness of the grinding-plate, which is deposited within it.

This grindingplate is shown at O as a thin flat plate of steel of uniform width and thickness, and adapted to fill the rabbet B, the width of this plate being such that its out-er edge projects beyond that of the bar A a halfinch, more or less.

In making up a roll the bar A is insertedin the roll and confined thereto by the rings ontering the notches a, c in the usual manner, the inner strips or keys of wood, I) b, being driven in place also in the usual manner. The grinding-plates G are now deposited in the rabbets of the bars, and the outer keys, 0 c, in sorted, which completes the rolls.

To prevent shifting of each plate 0 up on the bar A, various expedients may be resorted to.

- As shown in the accompanying drawings, short studs (Z (1 project from the front of the upper portion of the bar, as shown, while in the plate a series of holes are punched to inclose those studs. I do not in any sense confine myself to this manner of preventing slip between the plate G and bar A, as, for instance, the studs or pins may be upon the plates and enter pockets punched in the bars, or longitudinal ribs may be cast upon the bar to enter slots in the plate, or the adjacent face of the bar and plates may be fluted or indented to interlock for the same purpose. As the plates 0 become worn down to the edges of the bars A the outer series of keys, 0 c, are detached, the worn plates 0 removed and new ones substituted, and the keys returned to place, the bars. A not being disturbed.

Under this system the only expense of replacing worn bars with new ones is the cost of the grinding-plates and the labor of removing old ones and applying new ones, which is comparatively small, while the original cost of the body of the bar is much less.

I am aware that it is not new to secure grinding-plates to rollers in pulp-engines by passing rings through recesses in said plates at their longitudinal extremities to prevent radial or longitudinal displacement, and that it is not new to brace said plates 011 both sides by bars held in place by removable wedges or 2 I p I 286,216

keys; nor is it new to prevent radial displacesaid rahbets and have openings to receive said ment of said grinding-plates and render them studs, a metallic ring which sets into said radially adjustable upon the roll by forming notches, and the double series of inner keys,

ridges or protuberanoes upon a face adapted b, and outer keys, a, substantially as and for 15 5 to enter recesses in one of the bracing-bars, as the purpose set forth.

such devices have heretofore been used. In testimony whereof I affix my signaturein I do not claim any of said constructions 5 but presence of two Witnesses. What I do claim is- I OLIVER MORSE. The iron bars A, each having a rabbet, B, a \Vitnesses: ro notch, a, and studs d d, in combination'with H. E. LODGE,

steel grinding-plates O, which respectively fill V I,. CURTIS. 

